Onion Soup Histamine Information

Onion soup, simple as it appears, can have varying impacts on histamine levels based on its main ingredients: onions and broth. Onions are considered a low histamine food, and may even exert some antihistamine effects due to the presence of quercetin, a flavonoid with known antihistamine properties (Nutrients, 2016). Regarding the broth, often made from bones, it can potentially result in high histamine levels, depending on the cooking technique. Longer cooking times can lead to an increased histamine content (Food Chemistry, 2016). Attention should also be paid to any additional ingredients used in the soup, as many common additives and seasonings (such as vinegar and alcohol) are known to contain high histamine levels or act as histamine liberators. In conclusion, eating onion soup can both increase and decrease histamine levels, depending on the type of broth used and the cooking process. Please note that individual reactions may vary, and these results shouldn't be considered as an general advice for people with histamine intolerance. Further research might be required to fully understand the impact of these factors on histamine levels. References: 1. "Effects of Quercetin on Histamine and Inflammatory Cytokine Release from Human Mast Cells and Basophils." Nutrients, 2016. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6267493/ 2. "Effect of cooking methods on the histamine level in fish: An experiment with Japanese food." Food Chemistry, 2016. https://www.sciencedirect.com/science/article/abs/pii/S0308814615006438